9.
Why would we select a high spiral, turbo tap?
When
tapping a blind hole.
10.
What is meant by a compound plunge angle?
A
modified plunge angle used when single point threading insert is
programmed to approach the part at a certain angled approach.
11.
What is the angle of a National Pipe Taper thread in degrees,
minutes and seconds?
1
Degree 47 minutes 17 seconds
12.
What does the term Full Form Threading Insert mean?
An insert shape designed to cut a specific Thread Form including
the Crest and Root Radius.
13.
A tap can be described as a 3/8 – 16 GH3 tap. What exactly
does the GH3 mean?
The
pitch diameter of the Tap is 0.0015 obove nominal.
14.
What is the difference between a 3/4 – 10 UNF 2A and a 3/4
– 10 UNF 2B thread?
2A indicates an external thread and 2B indicates an internal
thread.
15.
Are these two threads the same size?
No
16.
Explain your answer.
The
Internal Class 2B thread must be larger for the class 2A thread to
assemble
17.
ANPT stands for Aeronoutical National Pipe Tape.
How does this thread differ to a NPT type?
The
ANFT is produced to 1/2 of the Tolerances.
18.
What does the term NPTF stand for?
National
Pipe Taper Fuel.
19.
Given a M12 x 1.75 - 6H thread, what is the pitch in inches?
0.06889”
20.
What does the term 6H mean?
